80 injector overhaul

Chris

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Went to my local diesel injection place to day. Been there for years and knows his stuff I believe. Anyhoo, said if I pulled them out and dropped them off, he could do a 48 hour service. Thought a lot of the 1HD-T motor. Agreed the starting at the injectors would be the best. He said that there was little value in doing spray tests etc and that just re tipping them and doing the flows with new seals etc was the right thing to do. He said that the price would vary on what they found but it'd be between 35 and 42 quid per unit plus VAT. G U L P !

That's 300 squid worst case scenario.

Does anyone have a view on that? Are injectors cheaper to just buy or are they like a grand each? Haven't found any yet on the Googlezone.

I have been playing with my fuel settings tonight and I have wound the click wheel almost top to bottom. Now other than a little less soot I though that top to bottom made very little difference. Maybe the injectors have sand in them. Also bought an oil catcher today to stop the yuk dribbling into my turbo.

Chris
 

Bat21

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A new set of injector nozzles HERE Chris, £108 delivered :thumbup:
 

Andy

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Me being a bit dense about these things, are these (in the ebay ad) just the tips that Chris refers to or the whole thing?

I suspect tips only at that price.

Is it a DIY job to fit new tips yourself, or as Chris also mentions the 'flows & seals' a specialist thing?

Andy
 

Chris

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Stop the bus! Now before someone pinches them, anyone any idea what would be involved in 'fitting' them. There is more to injectors than the tips. There is opening and losing pressures etc. If it were as simple as swapping them over then count me in.

Ideas? Nice find Paul. Wasn't googling for 'tips' or 'nozzles'

Chris
 
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Ian Rubie

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Not sure if it matters or not but I do not think there is any way they are genuine Toy at that price. They are nearly the same price for six as I would pay each :shock:

Ian
 

Rob

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If you get them refurbished would you expect to get genuine Toyota parts? Would it make a difference if the parts are up to spec? Just thinking out loud...
 

Ian Rubie

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I am not sure, is there a nozzle equivalent to a Milner Cv?

Ian
 

Chris

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reading the FSM, it seems that 'Unscrew old one, replace, have fun' are not in the instructions. measure, test, shim, check are the sorts of words that are in there. Other than actually having the words "Stop! Unless you know what you are doing, leave it!" printed in the manual, it's look as though you need to be a JW at least to do this. This price is just for the nozzle not all of the gubbins.

OK. Don't think that this is going to work. Anyone get injectors done cheaper anywhere else? Certainly my guy would not be using cheap bits. Commercial stuff, not Milners for sure. He rebuilds lorry engines.

Chris
 

Andy

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I was just reading the FSM as well, and i think that its best left to those who know!!
 

Dave Docwra

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£300 sounds a fair price for six injectors reconditioned, I am dropping mine in tomorrow & will let you know the cost.
 

Julian Voelcker

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I get injectors stripped, cleaned, tested and calibrated for around £22 + VAT.

Very occasionally they will require new nozzles and decent quality ones bump the price up to around £50 per injector - any cheaper than that would worry me on parts quality.

One key thing, make sure who ever works on the injectors has the kit to test dual stage/pressure injectors properly - I had to hunt around a bit to find a firm that had the right kit.
 

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I had my MK4 hilux ones done by a company in Aberdeen called Aiylea Motors http://www.airylea.com

They did an excellent job and it vastly improved performance and economy. They charged me £160 for the 4 injectors. I'm planning on doing the same to my 80 in the near future and I will be using Airylea again. :thumbup:
 

Chris

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Did 600 miles this weekend following a bit of fuel pump fiddling. Made little difference other then at one point crossing the A66 at night, under really heavy load, I had sparks coming out of the exhaust. Hmm. The exhaust is stuffed due to a tree stump at Lincomb and there may be leaks in it too. The sparks did look and smell like carbon / soot really not melting pistons or anything. Anyway, turned the fuel cog thingy right back when I got to Scotland and it drives fine. OK very little get up and go but in cruising terms it drove beautifully. My feeling is that the injectors must be in such a state that adjusting the fuel makes no difference top to bottom. On cold start up the smoke / fume is getting worse but it goes when warm or pushed. I have also confirmed my suspicions abut the inlet manifold. This is leaking. On top of the join there is a light film of dirty oil that keeps appearing. I cleaned it off, drove 80 miles and checked. Yep, back again. I can only assume that this is oil and air and muck being pushed by the turbo. The gasket actually looks as though it is de laminating. So there's another job. I shall take it off road this month (SORN) and get some of these jobs done. With the fuel done and the front diff it's going to be a pretty good example I think. It is nice to drive, I have to say and a great multi purpose vehicle. Even managed to get a stag in the boot!!!! Got a solid 20 mpg there and back. Fuel line improvements may help that a little

Chris
 

Chris

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Well, I took my jectors to the local chap to day to talk about what he could do. I bemoaned the fact that I couldn't afford £300 at the moment. He took them and said well let's test them simply and I may be able to give you a better idea. He stuck them on a rig and tested them all. Well they all looked identical to me.

Right, then he took a working injector and showed me the difference. Basically mine looked like a lawn sprinkler. 5 great big jets of fuel. Not a fine pulsed mist of fuel droplets. He confirmed that oil has been getting past the seat into the recess in the head. So they are in a complete mess so it would seem. He reckons that best will in the World, I am looking at the thick end of a full rebuild. When it's running, fuel is essentially just pouring into the cylinders hence the smoke, lack of power and the fact that no adjustments of the pump made any difference.

Where is that piggy bank?

C
 

Chris

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Yeah, true, but in a way rather hopeful. What's it going to be like when I get them done! Gonna be silky smooth. Hopefully the smoke will be gone too and maybe a few more MPG.

Has to be worth it.

Chris
 

Crispin

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What would the cause be? Age? bad fuel? Bad filter? Surely something of age with a liquid of "unknown" quality and precision is not expected to be the same as when new after 15 years? If someone with a perfectly running 80 took their injectors for a test, would they perhaps be the same?

I'm still bricking it taking mine to Mr-T for my injectors. :o I've been collecting piggie banks....
 

Chris

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All of the above Crispin, plus someone not knowing what they are doing, using old parts when new ones are a must. Oil should not leak past the injector seal to fill the cavity in the head!!

Proper job well done should cure it. On a high miler, there is bound to be some wear. To function properly, there has to be a certain resistance in the unit. As the orifices naturally wear, the pressure drops. It's like sticking you finger over the end of the hosepipe High pressure - low volume of low pressure - high volume. I basically have a teat on the end of injectors.

Chris
 

Gav Peter

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Chris said:
I am looking at the thick end of a full rebuild.
Has your man given you any idea on costs for that then Chris? MUX is a smokey old chap but he's relatively spritely (in my books...) but I wonder if I should consider having his looked at?
 
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